Claims
- 1. In a cooling device comprising a multi-stage cold accumulation type refrigerator, the improvement wherein said multi-stage cold accumulation type refrigerator comprises a compressor disposed at an ordinary temperature, a helium gas as a common operating fluid to be compressed by said compressor, and pluralities of expansion chambers and cold accumulators of different temperature levels, a final stage of said plurality of cold accumulators containing a cold accumulating material comprising an alloy or a compound of one or more rare earth metals; wherein an object to be cooled by said cooling device is cooled by attaching said object directly to the final stage of said multi-stage cold accumulation type refrigerator.
- 2. The cooling device of claim 1, further comprising radiation heat shields connected to thermal stages of said multi-stage cold accumulation type refrigerator other than said final stage.
- 3. In a cooling device comprising a multi-stage cold accumulation type refrigerator, the improvement wherein said multi-stage cold accumulation type refrigerator comprises a compressor disposed at an ordinary temperature, a helium gas as a common operating fluid to be compressed by said compressor, and pluralities of expansion chambers and cold accumulators of different temperature levels, a final cold accumulator containing a cold accumulating material comprising an alloy or a compound of one or more rare earth metals; wherein an object to be cooled by said cooling device is cooled by attaching said object through a heat conducting member to the final stage of said multi-stage cold accumulation type refrigerator.
- 4. The cooling device of claim 3, further comprising radiation heat shields connected to thermal stages of said multi-stage cold accumulation type refrigerator other than said final stage.
- 5. The cooling device of claim 3, wherein said heat conducting member comprises a heat pipe containing said helium gas.
- 6. The cooling device of claim 5, further comprising radiation heat shields connected to thermal stages of said multi-stage cold accumulation type refrigerator other than said final stage.
Priority Claims (6)
Number |
Date |
Country |
Kind |
63-284450 |
Nov 1988 |
JPX |
|
63-284452 |
Nov 1988 |
JPX |
|
63-284453 |
Nov 1988 |
JPX |
|
63-284454 |
Nov 1988 |
JPX |
|
63-284455 |
Nov 1988 |
JPX |
|
63-285991 |
Nov 1988 |
JPX |
|
Parent Case Info
The present application is a continuation of application Ser. No. 08/147,559, filed Nov. 5, 1993, now U.S. Pat. No. 5,365,743, which is a continuation of application Ser. No. 07/890,265, filed May 29, 1992, now U.S. Pat. No. 5,293,749, which is a divisional of (1) application Ser. No. 07/722,547, filed Jun. 26, 1991, now U.S. Pat. No. 5,154,063, (2) of application Ser. No. 07/721,816, filed Jun. 26, 1991, now U.S. Pat. No. 5,144,805, and (3) of application Ser. No. 07/721,135, filed Jun. 26, 1991, now U.S. Pat. No. 5,144,810, each of which is, in turn, a divisional of application Ser. No. 07/430,582, filed Nov. 1, 1989, now U.S. Pat. No. 5,092,130.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4475346 |
Young et al. |
Oct 1984 |
|
5009072 |
Nagao |
Apr 1991 |
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Related Publications (2)
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Number |
Date |
Country |
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721816 |
Jun 1991 |
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721135 |
Jun 1991 |
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Divisions (2)
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Number |
Date |
Country |
Parent |
722547 |
Jun 1991 |
|
Parent |
430582 |
Nov 1989 |
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Continuations (2)
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Number |
Date |
Country |
Parent |
147559 |
Nov 1993 |
|
Parent |
890265 |
May 1992 |
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